diff --git a/pyproject.toml b/pyproject.toml
index 52de26e..a92a894 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ dependencies = [
     "pydantic ~= 2.4",
     # For the `certvalidator` test harness.
     "certvalidator ~= 0.11",
-    "cryptography ~= 43.0",
+    "cryptography ~= 44.0",
     "pyyaml ~= 6.0",
     "pyOpenSSL",
     "certifi",